Magnetic ore-separator.



PATENTED JULY 10, 1906.

R. R. MOFPATT. V MAGNETIC ORE SEPARATOR.

APPLICATION FILED JULY 19, 1904.

2 SHEETS-SHEET 1.

M m m W m J. g

a W m No.- 825,672. PATENTED JULY 10, 1906.

R. R. MOFFATT. MAGNETIC ORE SBPARATOR.

APPLICATION FILED JULY 19, 1904.

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Q i 4 0 avwcvloz W. I 740 f UNITED STATES ATENT OFFICE.

RICHARD RHMOFF ATT, OF BROOKLYN, 'NEW YORK, ASSIGNOR TO IMPERIAL ORE SEPARATOR COMPANY, A CORPORATION OF NEW YORK.

MAGNETIC ORE-SEPARATOR.

Specification of Letters Patent.

Patented July 10, 1906.

Application filed July 19, 1904. Serial No. 217,222.

paratus for separating ore containing feeblymagnetic particles. v

he ob ect of my invention is the production of an ap aratus in which a very power: ful field or fieFds can be created and in which at the same time two or more fields of varying intensity may be produced, so that the strongly-magnetic particles are separated at one point, while the feebly-magnetic particles are separated at a subsequent point. v

To this end the invention comprises the features of construction and combinations of parts, as will more fully hereinafter a pear.

In the drawings, Figure 1 is an en view of an apparatus embodying my'invention and shown partly in section. Fig.2 is a longitudinal sectional view of Fig. 1, taken on an irregular line. Fig. 3 is a side elevation. Figs. 4, 5, 6, and 7 show various forms of detachable shoes for the poles.

Similar characters of; reference indicate corresponding parts in the difierentviews.

A structure capable of concentrating magnetic lines of force so as to produce a field or fields of great intensity is obtained by means of a magnet consisting of the upper and lower poles 7 and 8, of which there are only two the I resent instance, ener 'zed' by the coils 3 an 4 and secured to and in circuit with theend frames 1 by means of the cores 2. The upper core is adjustably secured to the end frames by means of the longitudinal bolts 5 and vertical bolts 6, by means of which the upper pole can be adjusted with relation to lower one.

The end frames are provided with apertures 11 ofa sufiicient size to enable the feedrect' earl conveyer 12 to pass horizontally through the inte olar space. This feed-.cbnveyer moves and is in the resent instance in the form 0 an' endless beii; passing over the the upper and drums 13, the material being fed to the said conveyer by means of the hopper 14 or otherwise; Intersecting this feed-con'veyer in the interpolar space is a separating-conveyer 15, also in the form of an endless-belt, passing over the drums 16,.suitably mounted on the shafts'17, carried by'the brackets 18,mount ed in the framework of the machine. On top of the upper pole there is a suitable idler 19, over which the endless conve er passes.

' Means are provided where two fields of varying intensity will bepro uced between ower poles of the magnet. there is in the present instance only one upper and one lower pole and one separatingconveyer, there will be produced two fields of force ofvary'ng intensity at different points of the same separating-conveyor. or at different, points in the sameinterpolar space. In this manner the strongly-magnetic particles wi ll be separated at one oint,while the feeblymagnetic particles will e separated at a'succeeding point. Preferably this is accomplished by abruptly intensifying the lines of orce in the interpolar space, so that they are greater at one point of the intersection than at a preceding point. This abrupt increasing in the intensity of the magnetic flux in the'interpolar spaceis preferably caused by bringin the feed-conveyer abruptly in closer proximity to the upper pole. Various means can be used for accomplishing this. Preferably I provide a deflecting attachment 20, consisting of the frame 21, mounted on the lower pole and carrying two rollers 22 and 23 disposed in such a manner that a portion of the feed-conveyer is brought abruptly nearer to the upperpole than the preceding ortion of the said feed-conveyor; When t e ore reaches the roller 22, it will pass underneath the same and onto that portion of the conveyer designated by the reference-letter 24,

where the highly-magnetic particles will be attracted to the separating-belt. The, remaining portion of t e ore will .pass on until it reaches that portion of the conveyor designated by 25, where the more feebly-magnetic particles will be attracted to the separatingconveyer and conveyed out of. the machine.

-The movement of the particles out of the machine is facilitated by the extension 26 on the upper pole which projects beyond the field of I ers, all constructed and arranged so as to proforce proper and in the direction of the movel duce two fields of varying intensity between the said poles.

ment of the separatingconveyer. V

4. In a magnetic ore-separator the com- The deflector for the feed-conveyer is ading conveyers, of a magnet having an upper 28, whereby the distance. of the feed-conveyer with relation to the upper pole can be varied. pole and a lower pole of opposite polarity on Instead of this or in addition thereto I may, the opposite sides of the conveyers, all conprovide one or both poles with removable structed and arranged so as to produce two shoes 9 and 10 in order to intensify the magfields of varying intensity between the said netic lines of force abruptly at a certain point poles. of the intersection of the two conveyers. In 5. In a magnetic ore-separator, the com- Figs. 4, 5, 6, and 7 I have shown various bination with intersecting feed and separatforms of shoes. The shoe shown on the lower ing conveyers, of a magnet comprising en pole in Fig. 2 is provided with step-like faces frames having apertures for the passa e of abruptly decreasing the distance between the one of said conveyers therethrough, an upupper and lower poles, thereby intensifying per and lower poles in circuit with the end the lines of force. frames.

What is claimed is 6; In a magnetic ore-separator, the com- 1. In a magnetic ore-separator, the combination with intersecting feed and separatbination of up er and lower poles of opposite ing conveyers, of a magnet comprising end polarity, recti nearly-moving feed and sepa frames having apertures for the assa' e of rating conveyers intersecting each other in one of said conveyers therethrougii, an upthe interpolar space and means whereby the per and lower poles in circuit with the end feed-oonveyer is abruptly brought into closer l frames forming two fields of force of varying roximity to the upper pole at one point than intensity. at the preceding point, whereby the strongly- 17. In a magnetic ore-separator, the comma netic particles are separated at one point bination with intersecting feed and separatof t e separating-conveyer and the feeblying conveyers, of a magnet comprising en magnetic particles are separated at another frames having apertures for the passage o point on the same separating-conveyer. one of said conveye'rs therethrough, and an 2. In a magnetic ore-separator, the comupper anda lower pole of opposite polarity bination of up er and lower poles of opposite forming two fields 0i force 'of varying intenpolarity, recti inearly-moving feed and sepasity.

l iustable by means of the slot 27 and screw bination with intersecting feed. and separatl rating conveyers intersecting each other in the interpolar space and adjustable means whereby the feed -'conveyer is abruptly brought into closer proximity to the upper pole at one point than at a preceding point, whereby the strongly-magnetic particles are separated at one point on the separating-conveyer and the feebly-magnetic: particles are bination with a magnet having upper and lower poles of opposite polarity, of feed and separating conveyers intersectin each other in the interpolar s ace, and stepike faces on one of said poles a ruptly decreasing the distance between the said poles] Signed at New York this 16th day of July,

separated at another point on-the same sepa- 1904. ratin -conveyer. r v,

3. %n a magnetic ore-separ'at'or,: the'- com- RICHARD MOFFATT' bination with intersecting feed and s'eparat Witnesses:

Ann V. BEEKEN, ANNIE W1ssEMANN.

ing conveyers, of a magnet having upper and lower poles on opposite sides of the conve'y l 8. In a magnetic ore-separator, the 'com' 

